[Unruptured aneurysm of the sinus of Valsalva associated with right ventricular outflow tract stenosis; report of a case].

A 51-year-old female was referred to our hospital for heart murmur and was diagnosed with right ventricular outflow stenosis by echocardiography. Six years later, follow-up echocardiogram revealed that the stenosis was caused by an aneurysm of the sinus of Valsalva (2 cm in diameter) originated from the right coronary sinus. Resection and patch closure of the aneurysm were carried out under complete cardiopulmonary bypass. The aneurysm was not associated with ventricular septal defect and was categorized as Sakakibara-Konno type I. Postoperative state was uneventful. Systolic murmur disappeared and pressure difference in the right ventricular outflow was normalized.